Siren and attaching means therefor



I L. H. MIL'ES S IREN AND ATTACHING MEANS THEREFOR Filed May 13, 1925 LIE- INVENTOR. LESTER H. MILES ATTORN mac Dec. 22, 1925.

A UNITED STATES PATENT OFFICE.

LESTER H. MILES, OF LOS ANGELES,-CALIFOBNIA.

SIREN ATTACHING MEANS THEREFOR.

Application filed nay '18, 1925. Serial No. 29,891.

new and-useful Improvement in Sirens and Attaching Means Therefor, of which the following is a full, clear, and exact description, reference being had to the accompanying drawin s.

This invention relates to sirens and attach in means therefor.

e general object of the invention is to provide an improved means for attaching a siren to a gasoline en ine in such manner that thesiren may be e ectively operated.

A further object of the invention is to provide an improved mounting for a siren whereby the latter, can be driven from the fan shaft of an en ine.

Other objects 0 the invention Wlll be apparent from the following'description taken in connection with ,the accompanying drawings wherein Fig. 1 is a side e evation partly in section showing my improved siren .attaching means; Fig. 2 is a tp plan view of the invention; Fig. 3 is a ont end view of the siren and attaching means and Fig. 4

is a front elevation of the siren with the cover removed.

Referrin to the drawing by reference characters, have shown an engine block at -10. A fan shaft is shown at.11. This fan shaft is provided at one end with a fan 12 having a hub 14 thereon which engages the fan. shaft. 'A pulley 15 has end anges 16 thereon, one of which is secured to the hub 14 in suchmanner that a belt passing over the pulley 15 will drive the fan.

Arranged upon the fan shaft 11 I show a driving disc 20. This disc is preferably made of suitable material such as vulcanite and it is apertured to receive bolts 21which pass through and are secured to the central portion of the pulley .15 as shown in Fi 1. Mounted upon the engine block 10, I s ow a bracket 25. This brac at is provided with apertures through which studs 26 extend and these studs receive nuts 27 for holding the bracket in place. The'bracket 25 is rovided with a boss 28 thereon through who 29 extends. This shaft is ad ustable through said boss 28 and to hold it in adjustable position, I provide a set screw 30. Upon the shaft 29 I arrange a siren 31. This siren 31 a shaft comprises. body part 32, a rotor and a cover 34. The body part 32 is provided with a boss 35 thereon through which a drive shaft 36 extends; Adjacent the boss 35 I arrange an offset portion 38 which is apertured to receive the shaft 29." A cotter pin 40 is secured upon the lower end of the shaft- 29 and this pin engages a washer 41 which in turn engages a sp-rlng 42. The spring 42' presses the siren upwardly into en agement with an adjustable collar 45 whic 1s normally held in position by a set screw 46.

The set screw 46 on the collar 45 is adapted to engage a stud 48 arranged upon the offset ortion 38. The construction is such that by oosening the set screw 46 the collar 45 may be turned so that the head of the set screw 46 will engage the stud 48 to hold the parts against the action ofya spring 50 which is connected to a late 51 on the casing 32 at one end and at t e other end is secured to an eye bolt which is secured to the engine 10.

In order to swing the case-32 for a purpose to be presently described, I provide a cou-- pling 53 including a ball and socket joint 54 which is connected by a rod 55 by an operating member (not shown) of any desired character. g

The shaft 36 is shown as provided with ball races 'at one end and at the other end the shaft is extended and is threaded as at 61. Upon the threaded ortion of the shaft,

I adjustably mounta rive disc 62. This drive disc may be made of any desired material such as vulcanite and is adapted to be held in place by lock nuts'63. By shifting the lock nuts longitudinally of the threaded portion 61 of the shaft 36 it will be ap arent that-desired adjustment of the drive isc 62 may .be effected ,so that the driving mechanism ma be used on engine assemblies of, widely different character.

In the operation of the device, the oper ator will ull the rod- 55 so that the drive disc 62 is rought into engagement with the driving disc 20 as shown in Fig. 2. When the use of the siren is no longer-required the operator releases the rod 55 thus causin the spring 50 to swing the siren about the s aft 29 to remove the drive disc 62 from engagement with'the driving disc 20. The studs 46 and 48 then engage to limit the action of the spring 50.

claim In a device of the class described, an engine, a fan shaft mounted to rotate thereon, a-fan on said fan shaft, said fan having a hub thereon, means to drive said fan, a driving disc arranged on said fan shaft and .adapted to be driven thereby, a supporting member mounted on said engine, a siren mounted on said member, said siren COIIIPIIS- ing a body part having a rotor thereln, a

10 drive shaft for said rotor, saidv drive shaft projecting from said body, a drive dlsc on said last mentioned shaft, and normally disposed adjacent said driving disc, means to swing said sirenupon its shaft to hold said drive disc spaced from said driving disc and means acting against said holding means to rotate said siren on its shaft and to bring said drive disc to engagement with said first driving disc.

my signature.

. LESTER H. MILES. I

'In testimony whereof, I hereunto 'aflix 20 

